If log₃2, log₃(2^x – 5), log₃(2^x – 7/2) are in arithmetic progression, then the value of x is equal to

The 288^th term of the series a, b, b, c, c, c, d, d, d, d, e, e, e, e, e, f, f, f, f, f, f…. is

The mean of 39 observations is 8. If one more observation of 48 is added to the data, the new mean will be